Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Filter Icon

Filters article

Years

FAQ Arrow
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

31,456 Article Results

Analysis of solar energy technology in leading countries

10.11591/ijpeds.v10.i4.pp1995-2004
Kannan Kaliappan , M Sankar , B Karthikeyan , Budamkayala Vineeth , V. Chetan Raju
In the present generation energy plays a vital role in our world and for human life it´s very important factor. There is a methodical meeting taking place regarding the conservation of energy and every time there is a review in the agenda. Energy demand and supply were endeavored by these countries. To rectify these problems, there should be more research in the generation of energy with the greater efficiency and try to use energy in more efficient manner. Solar energy remains as the most prominent source of energy as it is cost effective and environmentally friendly. Reviews convey that solar energy systems will play a major role in the power generations. As per present scenario there is a great importance to the solar energy using photovoltaic systems. Photovoltaic systems exhibit an important role for solar energy production.
Volume: 10
Issue: 4
Page: 1995-2004
Publish at: 2019-12-01

A study on the effectiveness of coping with test anxiety program based on cognitive-behavioral approach

10.11591/ijere.v8i4.20316
Fulya Türk , Ayşe Nur Katmer
The purpose of this study is to examine the impact of the program for coping with test anxiety based on the cognitive-behavioral approach on the levels of test anxiety, irrational thoughts, coping levels and academic self-efficacy perceptions of adolescents in the 8th grade. The study was performed as a semi-experimental study based on pre-test and post-test model with an experimental group and a control group. There were 32 students studying in the 8th grade in Kilis during the 2018-2019 school year participated in the study. While a seven-session Coping with Test Anxiety program based on Cognitive-Behavioral approach was applied to the students in the experimental group, no study was conducted with the control group. The Mann-Whitney U Test, Friedman Test, and Wilcoxon Signed-Rank Test were used in the analyses of data obtained from the study. According to study results, it can be said that the program for coping with test anxiety based on the cognitive-behavioral approach was significantly effective in the levels of test anxiety, irrational beliefs and active and avoidant coping levels of the adolescents while it was not effective in academic self-efficacy perceptions and negative avoidant coping levels.
Volume: 8
Issue: 4
Page: 666-675
Publish at: 2019-12-01

The exploitation of western and southern deserts in Iraq for the production of solar energy

10.11591/ijece.v9i6.pp4617-4624
Ahmed Zkear Abass , D. A. Pavlyuchenko
We have, an overview is presented of the potential future demands and possible supply of solar energy to Iraq. Solar energy, which is clean, unlimited, and environmentally friendly, is presented as a renewable energy resource. Many problems such as CO2 emissions, industry, human activities, and electricity distribution grids have attracted much attention because of the current state of crude oil production and its prices. Moreover, estimations of solar radiation levels and of the efficiencies of photovoltaics (PVs), concentrated solar power (CSP), and solar chimney towers, have all been investigated. Those systems that combine various sources of energy are called hybrids and they have received much attention in recent decades. The basic features of solar radiation in Iraq are outlined, and the selection of those sites with potential for development of solar plants is based on the local largest solar radiation. Moreover, longitudinal and latitudinal orientation, wind, solar intensity, dust, temperature, rain, humidity, and pollution factors are all considered in the calculation of PV/CSP efficiencies. We know there is an abundance of fossil fuels in Iraq, energy shortages began in 1991 because of the perturbation caused by the full ruin of the country. The obvious renewable energy resource available in Iraq is the solar energy, and its exploitation would provide a means to reduce CO2 emissions from the burning of fossil fuels and to achieve self-sufficiency of electric energy and export the rest to neighboring countries. Solar energy is becoming increasingly important because of the climatic change in the form of global warming.
Volume: 9
Issue: 6
Page: 4617-4624
Publish at: 2019-12-01

A review on cloud based knowledge management in higher education institutions

10.11591/ijece.v9i6.pp5420-5427
Ahmad Shukri Mohd Noor , muhammad younas , Muhammad Arshad
Knowledge Management (KM) is widely discussed by researcher and attracts many enterprisers to extract, dispense and use information in a systematic way under Knowledge Management System (KMS). New technology adoption within the knowledge management system is one of the core issue, identified by researcher and underlined as future research agenda. Cloud computing becomes the most adoptable choice for enterprisers to reduce infrastructure and maintenance cost by shifting business on the cloud. Higher Education Institutions (HEIs) are more enthusiastic about knowledge management due to its primary goal of knowledge creation and sharing. Cloud based knowledge management attract higher education institutions by changing the educational method and objectives due to innovative trends in technology. This exploratory research based on literature review for cloud-based knowledge management, targeting higher education institutions. This study highlights the benefits and challenges associated with cloud-based knowledge management system and its impact on knowledge.
Volume: 9
Issue: 6
Page: 5420-5427
Publish at: 2019-12-01

A new design algorithm for hybrid active power filter

10.11591/ijece.v9i6.pp4507-4515
Chau Minh Thuyen
The correct determination of the parameters of Hybrid Active Power Filter (HAPF) plays a decisive role in its performance. Therefore, this paper proposes a new design algorithm for HAPF based on the Social Spider Algorithm (SSA). This algorithm has the advantage that it is possible to determine the parameters of both the power circuit part and the control circuit part of HAPF. The achieved results are multi-purpose, such as: minimum total harmonic distortion of the supply current and source voltage, the maximum reactive power compensation into the system and satisfy many constraints such as: system stability, resonance conditions of the branches and the limits of the parameters. Compared to traditional design method using the Particle Swarm Optimization algorithm, the proposed algorithm shows the advantages of smaller total harmonic distortion of supply current and source voltage, and higher reactive power compensation into the grid while still meeting the constraints.
Volume: 9
Issue: 6
Page: 4507-4515
Publish at: 2019-12-01

Enhanced IPFIX flow monitoring for VXLAN based cloud overlay networks

10.11591/ijece.v9i6.pp5519-5528
Osman Ghazali , Shahzada Khurram
The demands for cloud computing services is rapidly growing due to its fast adoption and the migration of workloads from private data centers to cloud data centers. Many companies, small and large, prefer switching their data to the enterprise cloud environment rather than expanding their own data centers. As a result, the network traffic in cloud data centers is increasing rapidly. However, due to the dynamic resource provisioning and high-speed virtualized cloud networks, the traditional flow-monitoring systems is unable to provide detail visibility and information of traffic traversing the cloud overlay network environment. Hence, it does not fulfill the monitoring requirement of cloud overlay traffic. As the growth of cloud network traffic causes difficulties for the service providers and end-users to manage the traffic efficiently, an enhanced IPFIX flow monitoring mechanism for cloud overlay networks was proposed to address this problem. The monitoring mechanism provided detail visibility and information of overlay network traffic that traversed the cloud environment, which is not available in the current network monitoring systems. The experimental results showed that the proposed monitoring system able to capture overlay network traffic and segregated the tenant traffic based on virtual machines as compare to the standard monitoring system.
Volume: 9
Issue: 6
Page: 5519-5528
Publish at: 2019-12-01

Study of two-layered circular patch using moment method and genetic algorithms

10.11591/ijece.v9i6.pp5368-5375
Ahmed Mahamdi , Siham Benkouda , Mounir Amir , Sami Bedra
In this paper, new expressions for the effective radius and fringing capacitance have been derived to predict accurately the resonant frequency of the two-layered circular microstrip patch antenna. These expressions are obtained based on genetic algorithm and the data base is generated using moment method (MOM). The proposed model is very simple, fast, and valid for an entire range of permittivities and thicknesses of two-layered substrate. The present model has been validated by comparing our numerical results obtained for the resonant frequencies with measurements. Finaly, the effect of the two-layered substrate on the resonant charateristics of the circular microstrip patch antenna has been presented.
Volume: 9
Issue: 6
Page: 5368-5375
Publish at: 2019-12-01

Efficiency and energy modelling for PVT air collector with extended heat transfer area: a review

10.11591/ijpeds.v10.i4.pp2029-2036
Ahmad Fudholi , Mariyam Fazleena Musthafa , Ivan Taslim , Merita Ayu Indrianti , Intan Noviantari Manyoe , Mohd Yusof Othman
Solar energy is renewable and environment friendly and has been widely used in electricity generation and thermal energy through photovoltaic thermal (PVT) system. This system is beneficial in terms of maximum energy generation and cost of usage. The growing concern on energy sources and their usage has increased the significance and demand for PVT collectors. A PVT air collector consists of a PV panel and a thermal collector system. In PVT air collector, electricity and thermal energy are generated simultaneously. This review focuses on efficiency and energy modelling for PVT air collector with extended heat transfer area. Findings of this review indicated that PVT air collector with extended heat transfer area produced PVT efficiency higher than conventional PVT air collector. The thermal efficiency of PVT air collector for with and without extended heat transfer area are 21-83% and 12-70%, respectively, which the improvement of thermal efficiency is 15.7-42.8%.
Volume: 10
Issue: 4
Page: 2029-2036
Publish at: 2019-12-01

Hybrid approach of the fuzzy C-Means and the K-Nearest neighbors methods during the retrieve phase of dynamic case based reasoning for personalized Follow-up of learners in real time

10.11591/ijece.v9i6.pp4939-4950
EL Ghouch Nihad , En-Naimi El Mokhtar , Zouhair Abdelhamid , Al Achhab Mohammed
The goal of adaptive learning systems is to help the learner achieve their goals and guide their learning. These systems make it possible to adapt the presentation of learning resources according to learners' needs, characteristics and learning styles, by offering them personalized courses. We propose an approach to an adaptive learning system that takes into account the initial learning profile based on Felder Silverman's learning style model in order to propose an initial learning path and the dynamic change of his behavior during the learning process using the Incremental Dynamic Case Based Reasoning approach to monitor and control its behavior in real time, based on the successful experiences of other learners, to personalize the learning. These learner experiences are grouped into homogeneous classes at the behavioral level, using the Fuzzy C-Means unsupervised machine learning method to facilitate the search for learners with similar behaviors using the supervised machine learning method K- Nearest Neighbors.
Volume: 9
Issue: 6
Page: 4939-4950
Publish at: 2019-12-01

Robust power control methods for wind turbines using DFIG-generator

10.11591/ijpeds.v10.i4.pp2101-2117
Imane El Karaoui , Mohammed Maaroufi , Badre Bossoufi
The purpose of this work is to present the advantages of the power control (active and reactive) of a wind energy system in order to improve the quality of the energy produced to the grid by presenting two control strategies applied to the conversion system of wind energy equipped with an asynchronous generator with dual power supply. Both techniques are studied and developed and consist of a field control (FOC) and a sliding mode control. They find their strongest justifications for the problem of using a nonlinear control law that is robust to the uncertainties of the model. The goal is to apply these two commands to independently control the active and reactive powers generated by the decoupled asynchronous machine by flow orientation. Thus, a study of these commands will be detailed and validated in the Matlab / Simulink environment with the simultaneous use of the "Pitch Control" and "Maximum Power Point Tracking (MPPT)" techniques. The results of numerical simulations obtained show the increasing interest of the two controls in the electrical systems. They also attest that the quality of the active and reactive powers and voltages of the wind system is  considerably improved.
Volume: 10
Issue: 4
Page: 2101-2117
Publish at: 2019-12-01

Development of driving cycle under real world traffic conditions: A case study

10.11591/ijece.v9i6.pp4798-4803
Geetha A. , Subramani C.
The modeling of a car is essentially done by taking into consideration the driving terrain, traffic conditions, driver’s behavior and various other factors which may directly or indirectly affect the vehicle’s performance. A vehicle is modeled for given specifications and constraints like maximum speed, maximum acceleration, and braking time, appropriate suspension for the gradient of the road and fuel consumption. Henceforth, a profound study and analysis of different drive cycles are essential. A time dependent drive cycle is a condensed form of data that helps us to determine the time taken to conduct the driving test on the road. This article highlights the development of a real driving cycle in the area of Tamilnadu, India. On-road vehicle’s speeds versus time data were obtained along the selected route. The data obtained were analyzed first and then a new driving cycle was developed.
Volume: 9
Issue: 6
Page: 4798-4803
Publish at: 2019-12-01

Optimizing PEMFC model parameters using ant lion optimizer and dragonfly algorithm: A comparative study

10.11591/ijece.v9i6.pp5295-5303
Zainuddin Mat Isa , Norkharziana Mohd Nayan , Mohd Hafiz Arshad , Nor Ashbahani Mohamad Kajaan
This paper introduced two optimization algorithms which are Ant Lion Optimizer (ALO) and Dragonfly Algorithm (DA) for extracting the Proton Exchange Membrane Fuel Cell (PEMFC) polarization curve parameters. The results produced by both algorithms are being compared to observe their performance. As a results, the ALO shows great performance compared to DA. Furthermore, these results also being compared with the results of the other reported metaheuristics algorithms. The ALO and DA presented competitive results.
Volume: 9
Issue: 6
Page: 5295-5303
Publish at: 2019-12-01

Numerical investigation of V shaped three elements resonator for optical closed loop system

10.11591/ijeecs.v16.i3.pp1392-1397
Iraj Sadegh Amiri , Ahmed Nabih Zaki Rashed
This study have outlined numerical investigation of V shaped three element resonator. The stability parameter is measured against back mirror curvature radius, back mirror phase angle, focusing length, focusing mirror phase angle, folding range in both S plane and T plane. The stability parameter is changed in positive and negative trend under the operating system parameters. The stability parameter should be optimized in order to achieve high performance efficiency of resonator system. Beam radius variations are also measured versus focusing range, folding range, and back mirror phase angle. It is clear that the negative effects of increasing system parameters on beam radius variation in both S plane and T plane. 
Volume: 16
Issue: 3
Page: 1392-1397
Publish at: 2019-12-01

A Graph-based approach for text query expansion using pseudo relevance feedback and association rules mining

10.11591/ijece.v9i6.pp5016-5023
Siham Jabri , Azzeddine Dahbi , Taoufiq Gadi
Pseudo-relevance feedback is a query expansion approach whose terms are selected from a set of top ranked retrieved documents in response to the original query.  However, the selected terms will not be related to the query if the top retrieved documents are irrelevant. As a result, retrieval performance for the expanded query is not improved, compared to the original one. This paper suggests the use of documents selected using Pseudo Relevance Feedback for generating association rules. Thus, an algorithm based on dominance relations is applied. Then the strong correlations between query and other terms are detected, and an oriented and weighted graph called Pseudo-Graph Feedback is constructed. This graph serves for expanding original queries by terms related semantically and selected by the user. The results of the experiments on Text Retrieval Conference (TREC) collection are very significant, and best results are achieved by the proposed approach compared to both the baseline system and an existing technique.
Volume: 9
Issue: 6
Page: 5016-5023
Publish at: 2019-12-01

Robots swarm communication control based on biological behavior inspiration

10.11591/ijeecs.v16.i3.pp1379-1391
Mushreq Abdulhussain Shuriji , Tariq Mohammed Salman , Hussein A. Abdulnabi
Robot swarming, increasingly find importance in the last decade. In these systems, multi mobile robots have to work cooperatively to perform specified tasks. One of the compelling problems is that the robots movements should be in such a way that they should follow a specific guide and at the same time they should have the ability of obstacle avoidance. Inspiriting such movement from biological swarms is a compelling problem. Fish schools, bird flocks and sheep herds are particular examples of biological systems swarming. In this paper, a robot swarming algorithm was developed based on swarming rules noticed in these biological systems, the combination between the swarm members and the leadership control also explained, an ad-hoc non-essential communication system was proposed for the purpose of use in case of collective takeoff and collective landing swarm-robots, in which activated automatically.
Volume: 16
Issue: 3
Page: 1379-1391
Publish at: 2019-12-01
Show 1309 of 2098

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration